Mate Install problems

so im trying to install ubuntu mate 32bit and i cant seem to get the usb to boot it gives me graphics initialization failed error setting up gfxboot i read somewhere that i could type help and it would load properley so it tried this and it didnt work and after awhile a message comes up saying could not allocate memory and boot underneath it i cannot figure out why this is happening i am installing this on a toshiba nb250 with a intel atom n455 cpu this usb works fine in a different machine

any help would be appreciated

Take a look at the beginners guide and the part about booting after creating your bootable media: